Electric switch



Aug. 16,1927. ,639,196

T. A. PANGBURN ELECTRIG'SWITCH Original Filed Dec. 2 1

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Z A pozfgurn Patented Aug. 16, 1927.

TRUMAN A. renenunn, or CAMDEN, NEW JERSEY,

ELECTRIC SWITCH.

, Original application filed December 2, 1921, Serial No. 519,463.

December 11, 1923.

This invention relates to an improved electric switch, the invention being divided out of my co-pending application for burglar alarm, filed December 2, 1921, Serial No. 519, 16

The inventionseeks to provide an electrically governed change-over switch which may be manually set to control the operation of the alarm and wherein said switch, upon the opening of a window, for instance, will be thrown for closing a circuit through an annunciator, for example, which annunciator will continue to sound until the switch is manually actuated to break the circuit through the annunciator.

In the accompanying drawings:

Figure 1 is a perspective view of the switch plate employed'and switch assembly,

Figure 2 is a fragmentary perspectiveview of the switch,

Figure 3 is a fragmentary detail sectional View showing the mounting of one of the stop posts for the switchmember.

In carrying the invention into effect, I employ a supporting plate or base 10 which may be of suitable insulating material and mounted upon the plate is an angle bracket 11 bolted or otherwise secured'to the plate. Pivoted upon thebracket is a switch member 12 having a substantially triangular shaped body through which extends a bolt 13 connecting the switch member with the bracket and projecting from the base of the body at opposite edges thereof are substantially alined contact arms 14 and 15, the switch member thus being double-ended. The arm 14 is formed at its inner side with a beveled face 16 and extending through the plate 10 is apost 17, the end face of the arm being beveled to engage over said postv Similarly, the end face of the arm 15 is beveled to engage a binding post 18. Lying against the face of theplate 10 is a wear strip 19 secured by a binding post 20 and, as will be observed upon reference to Figure 3, the post 17 y is adjustable through said strip and is held in adjusted position by a lock nut 21. By adjusting the post 17, the throw of the arm 14 of the switch member may be varied.

J ournaled at one end through the smaller end of the body of the switch member 12 is a link 22 which extends at one side of the switch body therebeneath and coacting at its free end with the opposite end of said link Divided and this application filed Serial No. 680,021.

is a flat spring 23. This; spring is secured at its opposite end to the plate 10 by abolt 2%land coactingat oneend with the free end portion of said spring is an auxiliary spring 25 secured at its opposite end to the plate by: a bolt 26. Thus, the springs 23 and 25 will exert a tension on the switch member 12 tending to rock said member in either one direction or the other selectively with re spect to the pivotal center thereof. Accordingly, when the switch member is rocked downwardly to. engage the arm 14 thereof with the post 17, the upper end of the link will cross the pivotal center of the switch -member' for-holding said switch arm in on gagement withsaid post while, when the switch is rocked upwardly, the upper end of the linkwill shift to the opposite side of the pivotal center of the switch nrember for ho1ding the arm 15 in engagement with the post 18. Removably threaded into the smaller end of the body of the switch member is a lever 27 mounting a knob 28 which may be grasped for manually rocking the switch member.

Mounted upon the plate 10 adjacent the bracket 11 is an electro-magnet 29, the terminals of the windings of which are secured to spacedbinding posts 30 and arranged to cooperate with the lower end of said mag net is an armature 31. carried by one end of an actuating lever 32 for the switch member 12. The lever is pivoted upon a plate 33 secured to the plate 10 and formed on the lever end is an upstanding cam lug 34 having a beveled lower face to coact with-the beveled face 16 of the arm let of said switch member. Thus, assuming that the switch member is rocked to engage the arm 14 thereof with the post 17, energization of the magnet 29 will serve to attract the armature 31 for rocking the lever 32 so that the cam lug 34: will be shifted downwardly against the face 16 of said arm for tripping the switch member, when the spring 23 will operate to shift said switch member upwardly to engage the arm 15 thereof with the binding post 18. In the use of the improved switch, the electro-magnet 29 isincluded in a circuit in which is interposed an appropriate circuit closer while the binding post 18 is included in a circuit in which is interposed an annunciator. Accordingly, when the circuit closer is actuated to close the'circuit This armature is at its forward through the electro-magnet, the switch member 12 will be automatically tripped and, upon engagement of said switch member with the binding post 18, the circuit through the annunciator will be closed for sounding the annunciator. Thus, as will be seen, the sounding of the annunciator will continue until the switch men'iber 12 is manually rocked out of engagement with said binding post.

Having thus described the invention, what is claimed as new is:

1. An electric switch including a base, a contact carried thereby, a pivoted switch member mounted on the base, yieldable means acting on said member for rocking the member in one direction into engagement with said contact or in the opposite direction out of engagement with said contact, and a lever pivoted upon the base and provided with a cam face to ride on the switch member tor tripping said member.

2. An electric switch includin a base, a contact carried thereby, a pivoted switch member mounted in a plane at an angle to the base to coact at one end with said contact, alink pivotally engaged at its upper end with said switch member at a point above the pivotal center thereof and extending downwardly past said member toward the base, a spring fixed to the base and engaged with the lower end of said link to press downwardly thereon for rocking the switch member in one direction into engagement with said contact or in the opposite direction out of engagement with said contact and a lever pivoted upon the base to lie substantially parallel thereto and provided atone end with an upturned cam face to coact with the lower edge of the switch member near one end thereof for tripping said member.

8. An electric switch including a base, a contact carried thereby, a bracket upstanding from the base, a switch member pivoted upon the bracket in a plane at substantially a right angle to the base to coact at one end with said contact, a link jou'rnaled at its upper end through said member above the pivotal center thereof and extending downwardly beneath the member, a flat spring lined at one end to the base and at its opposite end engaging the lower end of the link for pressing downwardly thereon and rocking the switch member in one direction into engagen'ient with said contact or in the opposite direction out of engagement with said contact, the member being provided near one end thereof with an inclined lower edge, and a pivoted lever lying substantially parallel to the base and provided at one end with an upturned cam lug to coact with the inclined edge of said member :tor tripping the member.

In testimony whereof I allix my signature.

TRUMAN A. PANGBURN. [esf] 

